I am so glad to hear that the puzzle was solved for you, and that you are finally beginning to heal. What a difficult thing to experience on top of your stem cell transplant and post treatment.

This article, recently found by another of our Connect mentors, may help explain the lack of antibody testing:
https://www.npr.org/sections/goatsandsoda/2021/05/16/995446986/coronavirus-faq-should-i-get-my-antibodies-checked-after-i-get-vaccinated
The good news is that work is underway to both develop and test a true vaccine antibody test and to understand all the pieces that must work together to provide protection from Covid infection.

Please take good care of yourself as you continue to heal. I would love to hear about your further progress in the weeks and months ahead.
Sue